A turn signal must –

(a) consist of a steady or flashing illuminated yellow sign at least 150 millimetres long and 25 millimetres wide that –

(i) when in operation, is kept horizontal; and

(ii) when not in operation, is kept in a position so that it is unlikely that the driver of another vehicle or anyone else would regard it as a signal; and

(b) be fitted to the side of the light motor vehicle at least 500 millimetres and not more than 2.1 metres above ground level, in a position so that the driver of the vehicle, from the normal driving position, can see whether the signal is in operation; and

(c) be able to be operated by the driver from the normal driving position; and

(d) when in operation, be visible from both the front and rear of the light motor vehicle at a distance of 30 metres.